<template>
  <div class="my-counter">
    <button :disabled='good.goods_count <= 1' @click='good.goods_count--' type="button" class="btn btn-light" >-</button>
    <input @change="countChange" type="number" 
    class="form-control inp" 
    v-model.number="good.goods_count">
    <button type="button" class="btn btn-light" @click="good.goods_count++">+</button>
  </div>
</template>

<script>
export default {
  //接收父变量
  props: {
    good: Object
  },
  //数量控制要通过对象互相引用的关系来影响对象里的数量之，所以最好传对象进来
  methods: {
    //方法解决数量不能低于1
    countChange(){
      if(this.good.goods_count <1 ){
        this.good.goods_count = 1
      }}
  }
}
</script>

<style lang="less" scoped>
.my-counter {
  display: flex;
  .inp {
    width: 45px;
    text-align: center;
    margin: 0 10px;
  }
  .btn, .inp{
    transform: scale(0.9);
  }
}
</style>